California enacts a new law, the Park Protection Act $($PPA$),$ which restricts use of its state parks to state residents. Bert$$s elderly mother Ethel is visiting from Texas and wants to see Muir Woods, and is seriously annoyed when park rangers arrest her in the Woods, strip search her and then incarcerate her. Ethel challenges the constitutionality of the PPA under the $14$th Amendment. What standard of review?

Select one:

a$.$

Equal Protection Clause

b$.$

Due Process Clause

c$.$

Privileges and Immunities Clause

d$.$

None of the above